Pond Visitors

I was very thrilled to see these two little birds sitting on the lily pads in our pond. One is a blue tit and the other (we think) is a willow warbler (or it may be a chiff chaff - do you know which?) There is another picture in my blipfolio which may be clearer.

Whichever it is, I've never seen one near the pond before and would have taken more photos but for the fact that Simba and Mika decided to join me and the birds flew away!